JP3685233B2 - Ripper equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ripper device for a construction machine such as a bulldozer for excavating a rock or the like, and more particularly to a ripper device for improving the durability of a holder for inserting and holding a shank of a ripper device.
[0002]
[Prior art]
The ripper device mounted on the bulldozer will be described with reference to FIGS.
A bracket 20 a is fixed to the rear of the vehicle body 20. One end of the arm 11 is connected to the lower end of the bracket 20 a, and the other end of the arm 11 is connected to the lower end of the beam 12. The bottom ends of the tilt cylinder 13 and the lift cylinder 14 are connected to the bracket 20 a, and the rod ends of the tilt cylinder 13 and the lift cylinder 14 are connected to the beam 12.
A holder 1A for inserting and holding the shank 5 shown in FIG. 9 is fixed to the beam 12. The ripper device configured as described above excavates the rock by the shank 5 by applying the traction force of the vehicle body 20 and the driving force of the tilt cylinder 13 and the lift cylinder 14.
As shown in FIG. 9, the beam 12 is integrally configured by fixing the left and right brackets 12a and 12b, the left and right pipe members 12c and 12c, and the holder 1A.
The holder 1A is provided with a hole 1k having a quadrangular cross section in the vertical direction. A shank 5 having a quadrangular cross section is inserted into the hole 1k and is prevented from coming off by a pin 6.
[0003]
Next, the operation state of the shank 5 and the holder 1A during the conventional ripper work will be described with reference to FIG.
When an external force F acts on the tip of the shank 5, the front portion of the shank 5 is inclined by the backlash in the holder 1A, abuts against the upper end P2 of the holder 1A, and receives a reaction force from the Fa direction. Further, the rear surface portion of the shank 5 is inclined by the backlash in the holder 1A, abuts against the lower end portion Q2 of the holder 1A, and receives a reaction force from the Fb direction.
As a result, a reaction force acts on the upper and lower end portions P2, Q2 of the holder 1A, so that the inner surface of the insertion hole of the holder 1A with which the shank 5 abuts is worn or worn.
For this reason, conventionally, in order to prevent wear and settling of the inner surface of the insertion hole of the holder 1A, the inner surface of the holder with which the shank comes into contact is subjected to heat treatment to be hardened.
[0004]
[Problems to be solved by the invention]
However, the degree of surface hardening by the heat treatment described above has little effect on wear and tear, and it is necessary to frequently repair by welding. This repair requires disassembly and increases the cost of repair, and there is a problem that the number of days off due to repair increases and the operating rate of the bulldozer decreases.
[0005]
The present invention pays attention to the above-mentioned conventional problems, and attaches the wear plate to the inner surface of the insertion hole of the holder with which the shank abuts so that the shank abuts against the wear plate, thereby improving the durability of the holder. An object of the present invention is to provide a ripper device.
[0006]
[Means for solving the problems and effects]
In order to achieve the above object, a first invention of a ripper device according to the present invention is a ripper having a shank having a rectangular cross section that is inserted into a substantially quadrangular hole of a holder disposed at the rear of a vehicle body and is movable up and down. In the apparatus, a stepped groove portion 1a, 1b is provided in an insertion hole for inserting the shank 5, and a holder 1 for detachably attaching the wear plate 2a, 2b to the stepped groove portion 1a, 1b is provided , The relationship between the width a of the wear plates 2a and 2b and the width L of the shank 5 is a ≧ L.
According to the said structure, it was set as the structure which the wear plate bears the reaction force by the external force F added to the front-end | tip of the shank at the time of ripper work. For this reason, since the shank abuts against the wear plate during the ripper work, the wear of the insertion hole of the holder and the settling are not generated as in the conventional case, so that the durability is improved. In this case, the wear plate is made of wear-resistant steel having a high hardness, so that wear and set-up hardly occur. Therefore, weld repair operations as in the prior art holder is not operating rate is improved as a bulldozer.
In addition, since the relationship between the width a of the wear plate and the width L of the shank is a ≧ L, the entire shank width is in contact with the wear plate, and the shank is held without wobbling during ripper work. No abnormal wear or settling occurs, and durability can be improved.
[0007]
According to a second aspect of the present invention, in the configuration of the first aspect, a front wear plate 2a that contacts the front surface of the shank 5 and is attached to the stepped groove 1a at the upper end of the holder, and the opposite side of the front wear plate 2a Thus, the rear wear plate 2b that contacts the rear surface portion of the shank 5 and is attached to the stepped groove portion 1b of the lower end portion of the holder is detachably attached.
According to the above configuration, since the reaction force caused by the external force F applied to the tip of the shank during ripper work is handled by the front wear plate and the rear wear plate, the shank does not directly contact the holder. It was.
Therefore, since the wear and the settling of the insertion hole of the holder do not occur unlike the conventional case, the durability is improved.
[0008]
According to a third invention, in the configuration of the first invention or the second invention, the wear plate 2a, 2b having a predetermined length attached to the stepped groove portions 1a, 1b of the insertion hole for inserting the shank 5 and the holder 1 are provided. It is configured to be detachable by fastening means 3 and 4 such as bolts.
According to the above configuration, a stepped groove is provided in the holder, and a wearable plate having a predetermined length is detachably attached to the stepped groove by a fastening means such as a bolt. The cost is low because it is possible.
[0009]
According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, the wear plates 2a and 2b are reversed so that they can be used, and are detachable by fastening means 3 and 4 such as bolts. In addition, the fastening means 3, 4 such as bolts are configured not to protrude from the inside of the wear plates 2a, 2b.
According to the above configuration, since the wear plate is turned over to be usable, the life of the wear plate is doubled.
In addition, since the fastening means such as bolts does not protrude from the inside of the wear plate, the shank does not contact the head of the fastening means, the shank and the fastening means are not damaged, and the wear plate functions sufficiently. be able to.
Therefore, the wear plate replacement interval is extended, and the repair cost is low.
[0011]
According to a fifth aspect of the present invention, in the configuration according to any one of the first to fourth aspects, corners of the stepped grooves 1a and 1b provided in the holder 1 and corners of the wear plates 2a and 2b are R It is configured in a shape or a chamfered shape.
According to the said structure, since a crack does not generate | occur | produce from the corner | angular part of the stepped groove part provided in the holder, and the corner | angular part of a wear plate, durability improves.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the ripper apparatus according to the present invention will be described below with reference to FIGS.
Since the ripper device of the present invention is the same as the conventional ripper device described with reference to FIGS. 8 and 9 except for the holder, only the mounting structure between the shank and the holder will be described with reference to FIGS. .
As shown in FIG. 1, the holder 1 is provided with a stepped groove 1 a at the upper end of an insertion hole for inserting the shank 5 (similar to the insertion hole 1 </ b> K in FIG. 9). Further, a stepped groove 1b is provided at the lower end of the insertion hole for inserting the shank 5.
Wear plates 2a and 2b are removably attached to the stepped grooves 1a and 1b provided at the upper and lower ends by means of fastening such as bolts 3 and nuts 4 (referred to as fastening means 3 and 4). Yes.
Reinforcing plates 1d, 1f, and 1f are fixed to the holder 1 as shown in FIG. The reinforcing plates 1d, 1f, and 1f compensate for the strength reduction caused by providing the holder 1 with the stepped groove portion 1b.
As shown in FIG. 2, a reinforcing plate 1 h is fixed to the lower surface of the holder 1 to prevent the wear plate 2 b from coming out and to reinforce the holder 1.
Reinforcing plates 1c, 1e, and 1e are fixed to the holder 1 as shown in FIG. The reinforcement plates 1c, 1e, and 1e compensate for the strength reduction due to the provision of the stepped groove portion 1a in the holder 1.
As shown in FIG. 3, a reinforcing plate 1 g is fixed to the upper surface of the holder 1 to prevent the wear plate 2 a from coming out and to reinforce the holder 1.
[0013]
Next, a detailed view of the Q portion in FIG. 1 will be described with reference to FIGS.
As shown in FIG. 4, the head of the bolt 3 for attaching the wear plate 2b does not protrude inward (the shank 5 side) from the surface S of the wear plate 2b.
As shown in FIG. 5 which is an AA cross-sectional view of FIG. 4, the relationship between the width a of the wear plate 2 b and the width L of the shank 5 is a ≧ L.
4 and 5, R is provided at the corner of the stepped groove 1b of the holder 1, and R or chamfering is performed at the corner of the wear plate 2b.
The P portion at the upper end portion of the holder 1 in FIG. 1 has the same structure as the lower end portion Q portion described in FIGS.
[0014]
Next, the operation of FIGS. 1 to 5 will be described with reference to FIG.
As shown in FIG. 6, the shank 5 is inserted into the holder 1 to which the wear plates 2 a and 2 b are attached and fixed with pins 6.
When a load F acts on the tip of the shank 5 during the ripper work, the shank 5 comes into contact with the wear plates 2a and 2b at the upper and lower ends P1 and Q1 of the holder 1, and the shank 5 receives the reaction force of Fa and Fb. .
For this reason, the reaction forces Fa and Fb act on the wear plates 2a and 2b at the upper and lower end portions P1 and Q1 of the holder 1, so that the shank does not directly contact the holder 1.
Accordingly, since the shank 5 is in contact with the wear plates 2a and 2b during the ripper work, the wear of the insertion hole of the holder and the settling are not generated as in the conventional case, so that the durability is improved.
In this case, the wear plates 2a and 2b are made of wear-resistant steel having high hardness, so that wear and set-up hardly occur.
Therefore, the work of repairing the holder is eliminated as in the prior art, and the operating rate is improved as a bulldozer, and the wear plates 2a and 2b are made of wear-resistant steel having high hardness, so that wear and settling are unlikely to occur. If wear or settling occurs, maintainability is good because the wear plates 2a and 2b can be replaced by removing the fastening means 3 and 4 such as bolts.
[0015]
Further, if the front wear plate 2a and the rear wear plate 2b handle the reaction force due to the external force F applied to the tip of the shank 5 during the ripper work, the shank 5 does not directly contact the holder 1. .
Thereby, since the wear and the settling of the insertion hole of a holder do not generate | occur | produce like the past, durability improves.
[0016]
Furthermore, the wear plates 2a and 2b of a predetermined length attached to the stepped grooves 1a and 1b of the insertion holes for inserting the shank 5 and the holder 1 are configured to be detachable by fastening means 3 and 4 such as bolts. Is.
Thus, the holder 1 is provided with stepped grooves 1a and 1b, and the stepped grooves 1a and 1b can be detachably attached to the wear plates 2a and 2b having a predetermined length by fastening means 3 and 4 such as bolts. Since a shank similar to the conventional one can be used, the cost is low.
[0017]
Furthermore, since the wear plates 2a and 2b can be used by being inverted, the life of the wear plates 2a and 2b is doubled.
Further, since the fastening means 3 and 4 such as bolts are structured not to protrude from the inside of the wear plates 2a and 2b, the shank 5 does not contact the head of the fastening means 3 and the shank 5 and the fastening means 3 are damaged. The wear plates 2a and 2b can also function sufficiently.
Therefore, the wear plate replacement interval is extended, and the repair cost is low.
[0018]
Further, since the relationship between the width a of the wear plates 2a and 2b and the width L of the shank 5 is a ≧ L , the entire width of the shank 5 abuts against the wear plates 2a and 2b, and the shank 5 does not fluctuate during the ripper work. since the holding, eliminates that shank abnormal wear or fatigue occurs, and durability is improved.
[0019]
And since the corner | angular part of the stepped groove part 1a, 1b provided in the holder 1 and the corner | angular part of the wear plate 2a, 2b were comprised in R shape or a chamfering shape, the stepped groove part 1a, 1b provided in the holder of Since no cracks are generated from the corners and the corners of the wear plates 2a and 2b, the durability is improved.
[0020]
In the embodiment, as shown in FIG. 7, the mounting bolt holes 2c of the wear plates 2a and 2b and the dimension d of the end surfaces S1 and S2 are made equal, and the same treatment is performed on the stepped grooves 1a and 1b of the holder 1. Thus, the wear plates 2a and 2b can be turned upside down in each portion.
Usually, the wear plate 2a on the upper end side is worn and worn on the upper part, and the wear plate 2b on the lower end side is worn on the lower part, so that the wear plates 2a and 2b can be used in an inverted manner.
[0021]
In the above embodiment of the slipper device of the present invention described above, stepped grooves 1a and 1b are additionally formed in the holder 1 and the reinforcing plates 1c to 1h are fixed by welding. Needless to say, it may be integrally molded.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a holder of a ripper apparatus according to the present invention.
2 is a Y view of FIG. 1; FIG.
3 is an X view of FIG. 1; FIG.
4 is a detailed view of a Q part in FIG. 1; FIG.
5 is a cross-sectional view taken along the line AA in FIG.
FIG. 6 is a view showing the relationship between the holder and the shank during loading.
FIG. 7 is a view showing a wear plate that can be turned upside down.
FIG. 8 is a side view of a bulldozer equipped with a conventional ripper device.
FIG. 9 is a diagram showing a beam configuration of the ripper device.
FIG. 10 is a view showing the relationship between the holder and the shank during loading.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,1A ... Holder, 1a, 1b ... Stepped groove part 1c, 1d, 1e, 1f, 1g, 1h ... Reinforcement plate, 1K ... Insertion hole, 2a, 2b ... Wear plate, 3, 4 ... Tightening means, 5 ... Shank, 6 ... pin, 10 ... ripper device, 11 ... arm, 12 ... beam, 13 ... tilt cylinder, 14 ... lift cylinder, 20 ... bulldozer, 20a ... rear bracket.

Claims (5)

In a ripper device having a rectangular shank inserted into a substantially square hole of a holder disposed at the rear of the vehicle body and movable up and down,
Holders with stepped grooves (1a, 1b) provided in the insertion holes for inserting the shank (5), and wear plates (2a, 2b) removably attached to the stepped grooves (1a, 1b). (1) A ripper device , wherein a relationship between a width a of the wear plate (2a, 2b) and a width L of the shank (5) is a ≧ L.   The front wear plate (2a) that contacts the front part of the shank (5) and attaches to the stepped groove (1a) at the upper end of the holder, and the shank (2a) on the opposite side of the front wear plate (2a) 5) The rear wear plate (2b) which comes into contact with the rear surface portion and is attached to the stepped groove (1b) at the lower end of the holder is detachably attached. Ripper device.   The wear plate (2a, 2b) of a predetermined length attached to the stepped groove (1a, 1b) of the insertion hole for inserting the shank (5) and the holder (1) are tightened with bolts or the like (3, 4. The ripper device according to claim 1, wherein the ripper device is configured to be detachable.   The ripper device according to any one of claims 1 to 3, wherein the wear plate (2a, 2b) is turned into a usable shape by being reversed and detachable by a fastening means (3,4) such as a bolt. In addition, the ripper device is characterized in that the fastening means (3, 4) such as bolts do not protrude from the inside of the wear plate (2a, 2b). holder (1) Stepped groove provided in (1a, 1b) Corners and wear plates (2a, 2b) 5. The ripper device according to claim 1, wherein each of the corners has an R shape or a chamfered shape.

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